Home / 11,478.12-17,218.70-4,905.81

Finding the Fourth Proportional to 11,478.12, 17,218.70 and 4,905.81

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Solution

The fourth proportional to 11,478.12, 17,218.70 and 4,905.81 is: 7,359.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,478.12 : 17,218.70 = 4,905.81 : x
  2. Step 2: Convert to fraction form
    11,478.12/17,218.70 = 4,905.81/x
  3. Step 3: Cross multiply
    11,478.12x = 17,218.70 × 4,905.81
  4. Step 4: Simplify right side
    11,478.12x = 84,471,646.12
  5. Step 5: Solve for x
    x = 84,471,646.12/11,478.12
  6. Step 6: Final answer
    x = 7,359.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.